Democrats from certain states would have their reg magically changed to Republican on voting day during the primaries. I saw videos of people arguing at the booths saying they checked it a week ago and now suddenly they're R? Vast majority of these cases happened to Bernie supporters. Also Bill Clinton showing up at a few locations, closing streets and inadvertently blocking voters until polls closed. People in charge at booths/caucuses making decisions that hurt Bernie voters and helped Clinton voters. More examples come to mind that I saw footage of but it doesn't matter anymore and everyone has already made up their minds so even typing all this is nothing but a waste.